Tilt-swivel mechanism chair

ABSTRACT

A tilt-swivel chair employing a bearing base assembly in communication with connection plate or seat plate of the chair is provided. The tilting mechanism in forward and backward direction is provided by the spring which has a pushing and pulling action and the swiveling action is done along the side axis of the bearing base assembly, and the side axis is a cylindrical shape section with a bushing cap onto which a lever base is equipped and is connected to the connection plate or seat plate. The balance ball feeling is provided with the spring action. A cam and lever mechanism is provided at the base of the side axis in corporation with the base section of the assembly. The cam and lever mechanism provides a smooth swiveling action to the seat and to lock and shut down and take a break.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of and takes priority from U.S.Provisional Patent Application Ser. No. 62/883,979 filed on Aug. 7,2019, the contents of which are herein incorporated by reference.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to flexible structures employed in officesand other work places. More specifically the present invention relatesto devices such as office chairs having a swivel and tilt mechanism withflexibility provided to give a balance ball feeling while the mechanismof the present invention improves blood circulation and prevents sittingdisease symptoms.

Description of the Related Art

An occupant of a chair, such as an office chair, does not remainstationary throughout the course of the day. The occupant is frequentlyrequired to change position, whether to move the occupant's spatialposition on the floor, or to rotate to face sideward or rearward, or toreach for an object positioned away from the occupant. Also, a boardsuch as a drawing board, writing board, stool do not have a ball balancefeeling to the user.

To an extent, modern desk chairs address these mobility concerns byproviding caster wheels on the base (allowing spatial positioning) andby providing a swivel means immediately below the seat part of the chair(allowing the occupant to face in different directions). However, chairdesigners have had difficulty addressing the reach concern withoutcompromising the comfort or safety of the occupant.

A variety of reclining swiveling task chairs with typical mechanisms arebeing used in offices and other work places. The swivel mechanismprovides the user to adjust the height of the chair to a working levelor any desirable height. Some of the chairs are also configured to havea tilting mechanism to allow the tilting of the seat forwards andrearwards with the backrest provided to allow the user when employing arearward tilt or either a forward tilt to rest or lean the lower backtowards the backrest of the chair. The mechanism where the chairs havethe backrest or back-support pivotally arranged to a seat in aconventional manner and the movement of the backrest relative to theseat can create shear force which clearly acts on the lower back and thelegs of the user leading to a lower back-pain and thigh pain of theuser. The shear force generated by the leaning of the back towards thebackrest of the chair is unaligned force which pushes one part of theuser body in one specific direction and the other part of the body inthe other direct and there results the lower back pain which istransferred through the spinal cord of the user.

The ergonomics of the chairs at the work places is an importantcriterion being overlooked for years. A number of efforts have beenemployed to enhance the comfort of the user and to promote ergonomicallyhealthy seating for a prolonged duration in offices or other workplaces. The fundamental requirements for the chair to be an ergonomicare that it should have at least these requirements such as seat heightadjustment, seat depth adjustment or seat slider, back rest heightadjustment, swivel base, back angle adjustment and the like. These kindof mechanisms are usually provided with the chairs but with pooradjustment of the links such as the synchronization of the seat withrespect to the back rest is provided with these conventional ergonomicchairs but this synchronization of tilting and the swiveling is atdifferent rates with generally back tilting at a greater rate than theseat. Generally, the synchronization of the tilt-swiveling chairs isconfigured to a four-bar linkage or three-bar slide linkage. In athree-bar slide configuration, the sliding path is typically linear.This kind of chair often have a bulky structure with multiplicity ofcomponents and the parts that can be difficult to assemble and timeconsuming and requires a lot of fasteners or joints to connect thecomponents resulting in bulky structure.

In addition, many chairs with a backrest for the office work with thebackrest inclined rearwardly and are constructed such that the backrestis mounted inclinable on a support base supporting a seat with aresiliently urging mechanism to urge the backrest forward. Another typeof chair is constructed with the seat and the backrest being an integralpart in which the front end is supported inclinable on the front end ofthe support base with the resiliently urging mechanism to urge the seatand the backrest in a desirable direction. The limitation with thesekinds of chairs is that when a rearwardly directed pressure is appliedto the backrest, only the backrest or both the backrest and the seat arerearwardly inclined against the urging force so that the chair can takea rest position. The center of gravity of the user is greatly shiftedrearwardly relative to a support base provided on the leg and the useris likely to fall down rearwardly.

Different kinds of needs arise with a chair to adjust and to accommodatefor the user such as size. An office or any class of chair is desirableto have a proper armrest with vertical adjustment capabilities, lateraladjustment capabilities and pivotable adjustment capabilities in avertical plane. These combinations are merely provided in the currentergonomic chairs as these capabilities in combination employ a complexstructure, moving parts assembled together being expensive tomanufacture. Current ergonomic chairs provide vertical adjustmentcapabilities and employ a support member that extends vertically downalong the side of the chair, wherein the armrest or the support memberinterferes with the legs of the user and other objects as the user has amovement on the chair. Moreover, the range of the adjustment istypically limited to the length of the support member and if the supportmember is large or extends below the seating surface the mobility of thechair is interfered. The ergonomics of the chairs currently have a vastscale of measurement depending mainly upon the comfort, the structure,size and the expenses.

Chairs with adjustable seat depths often employ devices and mechanismsto shift the entire seat in a forward and rearward direction relative tothe backrest. Therefore, such chairs must provide for structure to allowthe seat to move relative to the backrest while at the same time bearingthe load of the seat and user. Moreover, such chairs typically mustemploy an extra support member which allows the seat to move thereon,for example, when the seat or support member is integrated into thelinkage assembly.

Long hours of sitting in office or any other work place createsgenerally lower back and joints pain with reason being of less movementof the body parts. When there is less stretching of body parts of theuser, it leads to improper growth of abdomen and upper thighs. Althoughthe swivel and tilt mechanism provided in the office chairs may somehowprovide a movement to some body parts but does not provide a balancingaction or feeling automatically without actively making the user to dosome physical work. In many countries different surveys have been donein the office for working people sitting for a prolonged duration on achair, and as the work is necessary so the chairs must be designed tohave some action of wiggling and giggling so that there is a properblood circulation and hence less diseases.

In one of closest art, US'539A1 discloses a chair equipped with a legcolumn, a seat, and a back support. An intermediate supporting member isfitted to an upper end of the leg column, the seat and a back frame arefitted to the intermediate supporting member, and the back support isfitted to an upper end of the back frame via a joint unit. The seat hasan elongated shape when viewed from the top, and is fitted to theintermediate supporting member to swivel horizontally. The back supportcan be turned freely around a first axis and also can be turned freelyaround a second axis. Since the seat and the back support can be changedinto various modes, a using mode of the chair can be changed variously.However, the art does not disclose of a mechanism to shut or wrap thechair down to take a break.

In another closely related art, US' 7610 discloses a chair with a swivelseat and backrest includes a base support having a central portion onwhich is vertically mounted a hydraulic cylinder, the hydraulic cylinderhaving an upwardly extending piston rod, a seat having a bottom providedwith a base frame, a first gear disposed under the base frame, abackrest having a lower portion provided with a support member, thesupporting member having a lower end provided with a second gear meshedwith the first gear, a bracket including an upper mounting and a lowermounting, the upper mounting having a top provided with two verticalbolts, one of the vertical bolts extending upwardly through the firstgear to engage with the base frame, another one of the vertical boltsextending upwardly through the second gear to engage with the supportingmember, the lower mounting being fixedly connected with the uppermounting having a downwardly extending tubular portion receiving thepiston rod, and two armrests fixedly mounted on two opposite sides ofthe backrest, whereby the seat and the backrest can be rotated inopposite directions as desired thereby making it able to give exerciseto an user's lumbar. However, the disclosed mechanism fails to discloseabout the movement of a user of chair while sitting and activating thecore muscles (back and abdominal), activating both feet in order tobalance the body.

In another closest art, US'6690 disclose a height adjustable work chaircomprising a seat, a base, and a non-swiveling height adjustment columndisposed intermediate the base and the seat. The height adjustmentcolumn comprises at least two telescoping height adjustment mechanisms,wherein the telescoping height adjustment mechanisms secure the seatagainst rotation in relation to the chair base. The work chairadditionally comprises means to actuate the height adjustmentmechanisms. However, the discussed art does not discuss about amechanism to get rid of back and joints pain of a user which is highlyneeded.

Ideally, an ergonomic chair should be able to move in differentdirections, also in the horizontal plane, as is the case with anexercise ball, for example. Therefore, there is a desire and need tohave an ergonomic sitting in the form of a mobility of the entire body,the sitting position can be changed as desired and the spine remains inmotion. Such mobility prevents tension that could cause serious discdamage. Additionally, there is a desire and need for a mechanism toachieve the exercise ball balance for plurality of applications such asbalancing a board to draw and write. Finally, there is also a desire andneed for a swiveling and tilting mechanism that does allow an apparatususing the mechanism stops in a balanced position, and also the mechanismallows the apparatus to stop in different tilting positions and may beused to build a tilt swivel base board, tilt swivel TV cabinet, TVdisplay base, video display device, advertisement board or any wallmounted apparatus.

In view of above aforementioned problems, a novel mechanism is strictlyneeded which can be adapted or used with any manufacturer chair to givea balance ball feeling and make any user of chair user does not need toactively use, rather it is making his body work automatically.

SUMMARY OF THE INVENTION

The following presents a simplified summary in order to provide a basicunderstanding of some aspects of the disclosed innovation. This summaryis not an extensive overview, and it is not intended to identifykey/critical elements or to delineate the scope thereof. Its solepurpose is to present some general concepts in a simplified form as aprelude to the more detailed description that is presented later.

The subject matter disclosed and claimed herein, in one embodimentthereof, discloses a mechanism which is adaptable and can be used withany working chair. The mechanism disclosed provides the feeling andbenefits of sitting on a balance ball, but looks like a regular officechair. The invention is novel such that the mechanism does not need theuser to use force to activate it, rather the user needs to be active inorder to properly sit.

In one of the preferred embodiments of invention, the mechanism of thebearing base assembly allows the user to shut the tilting and swivelingmechanism down.

In another preferred embodiment of the invention, the mechanism of thebearing base assembly and the chair-chair connection mechanism allowsthat a user does not need to actively use the mechanism of the presentinvention, rather the mechanism of the chair makes his body to workautomatically.

In another embodiment of the invention a spring is disposed in thelateral section of the bearing assembly, which performs a pushing andpulling function, when the tilting of a seat chair either rearwardly orforwardly is done by the user and provide a balancing ball comfort tothe user. The bushings provided at the bottom of the pushing and pullingspring provide stability during the tilting of the chair. A side axis isinstalled vertically proximal to the spring assembly and is connected tothe chair-chair mechanism connection or seat plate of the chair. Theside axis may be a hydraulic cylinder or a pneumatic cylinder as inconventional sliding and tilting chairs provided a lever base at the topportion of the side axis. The swiveling action of the seat is performedalong the side axis of the chair.

In another preferred embodiment of the invention a bearing base of main,lower and upper into which the bushing is installed and upon whichpushing and pulling spring is installed for the tilting action with abalance ball feeling is disclosed. A cam and lever mechanism is providedat the base of the side axis in corporation with the base section of theassembly. A plurality of screw nuts is provided at the upper and lowerbearing base of the assembly. A number of screw flat nuts are alsoprovided at the base of the bearing base assembly. The cam and levermechanism provides a smooth swiveling action to the seat and to lock andshut down and take a break. Further the cam and lever mechanism incorporation with the spring assembly provides a balancing ball actionthrough tilting action.

In another embodiment of the invention a backrest connecting flange asdisplayed like an extruded portion of the base plate provides a smoothforward and rearward motion to the backrest of the chair during thetilting and swiveling action of the user chair. The connecting bearingto seat plate is provided to be connected to the bearing base assemblyof the swivel-tilt chair.

To the accomplishment of the foregoing and related ends, certainillustrative aspects of the disclosed innovation are described herein inconnection with the following description and the annexed drawings.These aspects are indicative, however, of but a few of the various waysin which the principles disclosed herein can be employed and is intendedto include all such aspects and their equivalents. Other advantages andnovel features will become apparent from the following detaileddescription when considered in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The description refers to provided drawings in which similar referencecharacters refer to similar parts throughout the different views, and inwhich:

FIG. 1 illustrates a front view of the swivel-tilt mechanism chair ofthe present invention in accordance with the disclosed architecture.

FIG. 2 illustrates a side isometric view of the swivel-tilt chair of thepresent invention in accordance with the disclosed architecture.

FIG. 3 illustrates a perspective view generally from the bottom of theswivel-tilt chair utilizing the tilt assembly of the present inventionin accordance with the disclosed architecture.

FIG. 4 illustrates a perspective view generally from the top of theswivel-tilt chair utilizing the tilt assembly of the present inventionin accordance with the disclosed architecture.

FIG. 5 illustrates a front exploded view of the swivel-tilt mechanismchair of the present invention as per the disclosed architecture.

FIG. 6 illustrates a disassembled side view of the swivel-tilt mechanismchair of the present invention as per the disclosed architecture.

FIG. 7 illustrates a disassembled view of the components of the lowersection of the swivel-tilt mechanism chair of the present invention asper the disclosed architecture.

FIG. 8 illustrates a front view of a lower section of the swivel-tiltmechanism chair of the present invention as per the disclosedarchitecture.

FIG. 9 illustrates a sectional view (A-A) of the bearing base assemblyof the swivel-tilt chair of the present invention as per the disclosedarchitecture.

FIG. 10 illustrates a top view of the bearing base assembly along thesection A-A assembly of the swivel-tilt chair of the present inventionas per the disclosed architecture.

FIG. 11 illustrates a compact view of the bearing base assemblymechanism of the swivel-tilt chair of the present invention as per thedisclosed architecture.

FIG. 12 illustrates a perspective view of a control lever forcontrolling tilt of seat of the chair and its associated structure.

FIG. 13 illustrates a sectional view of control lever for controllingtilt of seat of the chair of the present invention in accordance withthe disclosed architecture.

FIG. 14 illustrates a side view of control lever for controlling tilt ofseat of the chair of the present invention in accordance with thedisclosed architecture.

DETAILED DESCRIPTION OF THE SEVERAL EMBODIMENTS

The innovation is now described with reference to the drawings, whereinlike reference numerals are used to refer to like elements throughout.In the following description, for purposes of explanation, numerousspecific details are set forth in order to provide a thoroughunderstanding thereof. It may be evident, however, that the innovationcan be practiced without these specific details. In other instances,well-known structures and devices are shown in block diagram form inorder to facilitate a description thereof. Various embodiments arediscussed hereinafter. It should be noted that the figures are describedonly to facilitate the description of the embodiments. They are notintended as an exhaustive description of the invention or do not limitthe scope of the invention. Additionally, an illustrated embodiment neednot have all the aspects or advantages shown. Thus, in otherembodiments, any of the features described herein from differentembodiments may be combined.

The tilting-swivel chair mechanism as displayed in the figures isconstructed in accordance with the present invention. The mechanism inthe present invention has three axis of movement such as tiltingmechanism which gives a balance ball feeling, when a user properly sitson the chair by touching both the feet to the ground and balancethemselves with the lower back and abs muscles. This balancing actautomatically lets the body properly sit upright which improves thecirculation of the blood in the body and prevents from the symptoms ofthe disease. The swiveling mechanism of the chair allows the user tomove around the center axis with movement of the feet, this movementwork continuously and cannot be stopped, the user moves the hip whilethe feet are on the floor, thus increasing blood circulation and movingthe joints in the knees and ankles.

FIG. 1 illustrates a front view of the swivel-tilt mechanism chair ofthe present invention as per the disclosed architecture. The swivel-tiltmechanism chair 100 of the present invention comprises a backrest 102,right arm rest 104, left arm rest 106, a seat 108, a base 110 containingrollers/wheels 1101, 1102, 1103, 1104 and 1105, a hydraulic or pneumaticcylinder 112 which rotates inside a bush 114 and performs swiveling orrotating action of the chair 100. When a user sits on the seat 108, theswivel action allows the user to move around the center axis by usingfeet on floor. The seat 108 has a front, a rear, left and right sides, atop and a bottom side. Top section 1081 of seat 108 typically is formedof a cushion material on which a person may sit. The user can move thehip placed on the top section 1081 in clockwise or anti-clockwisedirection, while keeping the feet on the floor at a particular position.The movement of the user's leg improves physical hygiene by increasingthe blood circulation. The joints of the knees and the ankles are alsomoved which gives a flexibility to the joints and improves joint fluidand hence improves health. The tilting is a free movement that gives abalance ball feeling when the mechanism of tilting is on. The user needsto properly sit on the chair seat 108 by keeping both the feet on thefloor and balance themselves with the lower back and the abs muscles.The balancing act of the swivel-tilt chair 100 automatically lets thebody to properly sit upright. This upright position of the body duringthe balancing action or tilting action improves the blood circulationand helps the user in preventing any symptoms of sitting diseases suchas obese body, and the like. Further, the height of the chair 100 iscontrolled from a regular feet-controlled piston.

FIG. 2 illustrates a side isometric view of the swivel-tilt chair of thepresent invention in accordance with the disclosed architecture. Asshown in the FIG. 2, the swivel-tilt chair 100 discloses a backrest 102with a convex structure 1020 to provide a comfortable feeling to theback and shoulder of a user. The backrest 102 is offset from a centerline 210 of the swiveling action line of the chair 100. The backrest 102defines a partial spherical convex surface 1020 to support the back ofthe user. A control lever 206 is also shown to control the tiltingmechanism in a forward direction or a backward direction from the restposition of the chair 100. The right armrest 104 and/or left armrest 106can also be adjusted in a vertical direction using a force in downwarddirection on the armrests 104 and/or 106 respectively. The chair 100swivels around the center line 210 in 360 degrees when the user properlysits on the chair seat 108 by keeping both the feet on the floor andbalance with the lower back and the abs muscles. The backrest 102 isconnected to the chair-chair mechanism plate 208 using a fasteningmechanism such as bolt fasteners. Backrest 102 extends upwardly andgenerally vertically from adjacent rear of seat 108 and is secured toassembly 214 via an L-shaped connector 202 which has an upwardlyextending leg secured adjacent the lower end of rear of backrest 102 anda forward extending leg which is secured adjacent its front terminal endto chair-chair mechanism plate 208. The chair 100 is rotated along thecentral line 210 using a hydraulic or pneumatic cylinder 112 whichrotates inside the bush 114.

FIG. 3 illustrates a perspective view generally from the bottom of theswivel-tilt chair utilizing the tilt assembly of the present invention.The movement of the chair 100 along the floor is provided by a pluralityof roller casters 1101, 1102, 1103, 1104 and 1105. The roller casters orwheels 1101, 1102, 1103, 1104 and 1105 may be double rollers or singleroller as per the requirements of the user. The arm rests 104, 106provided on both sides of the seat 108 is connected to the chair-chairmechanism plate 208 with an adjustment mechanism 302 to adjust theheight of the arm rest 104 and/or 106 accordingly. A height adjustmenthandle portion 302 is provided on a lower side of each arm elbow 104 and106 to adjust the height of the armrest. The elbow or L-section 304 ofthe arm rest 104, 106 is connected on the both sides of the chair-chairplate 208 through a fastening mechanism such as bolt fasteners. Theheight adjustment handle portion 302 of the arm rest 104, 106 may useheight adjustment mechanisms known in the art may also be used. The seat108 has a front, a rear, left and right sides, a top and a bottomsection. Top section 1081 of the seat 108 is typically formed of acushion material on which a person may sit while a bottom section 1082is typically formed of a rigid material to which a chair-chair plate 208is secured through fastening mechanism such as bold fasteners. Otherfastening mechanisms may also be used as per the requirements of theuser.

FIG. 4 illustrates a perspective view generally from the top of theswivel-tilt chair utilizing the tilt assembly of the present invention.The armrests 104, 106 are made up of plastic, silicon or any othermaterial which is durable and soft and have dimensions suitable for anarm to be conveniently put on the armrest. Further, the armrests 104,106 can be adjusted in height as per the needs and desires of the user.As visible, the backrest 102 has a convex shaped structure 1020 tosupport user's shoulders and back. The seat 108 has dimensions suitablefor the user to sit comfortably. The seat 108 may be flat or concave inshape to give required comfort to the user.

FIG. 5 illustrates a front exploded view of the swivel-tilt mechanismchair of the present invention. As shown in FIG. 5, the three sectionsof the swivel-tilt mechanism chair 100 are displayed. An upper sectioncomprising backrest 102 having a convex shape 1020 and a backrestconnecting flange 202 to connect the backrest to a chair-chair plate208, the middle section disclosing the concave seat 108 and the armrests 104, 106 with their elbows or L-sections 304 which are connectedto the bottom plate or the chair-chair plate 208. The upper section ofthe present invention comprising the chair assembly 102 is replaceableand other assembly may be attached to the plate 208 as per the userdesires. For example, a base board may be attached to the plate 208,that enables the base board to tilt or swivel as per the needs andrequirements of the user. The base board may be used by the user fordrawing, writing or tutorial purposes. In other embodiments, a tiltswivel base board, tilt swivel TV cabinet, TV display base, videodisplay device, advertisement boards or any mountable apparatus may beattached to the plate 208 for serving different purposes to the user.

The lower section includes chair-chair plate 208 to which the concaveseat 108 is attached on an upper side and bearing assembly 402 isattached to a lower side of the chair-chair plate 208. A control leveror handle 206 is attached to the chair-chair plate 208 to control thetilt of the concave seat 108 of the chair 100. On the lower side of thebearing assembly 402 a cylinder which can be pneumatic or hydrauliccylinder 112 to adjust the concave seat 108. An upper end 1121 of thecylinder 112 is attached to the bush 114 a lower end 1122 of thecylinder 112 is attached to a wheel flange 404 to which a number ofrollers 1101, 1102, 1103, 1104 and 1105 are attached through legs 502.

As shown in FIG. 5, a clocking bushing 114 is provided to the pneumaticcylinder 112. The bush 114 preferably has a tab-in-groove fit with thecylinder 112. The bush 114 has the function of transferring swivelmotion from the cylinder 112 to the bearing assembly 402, which furtherleads to swiveling action of the chair 100.

FIG. 6 displays a disassembled side view of the swivel-tilt mechanismchair of the present invention. As shown in FIG. 6, the convex shaped1020 backrest 102 and the concave shaped seat 108 is assembled byutilizing a connecting flange 202 and a chair-chair plate 208respectively. A handle or a control lever 206 is provided just below thechair-chair plate 208, wherein the handle 206 is an L-shaped rod with ahandle on the one end and is attached chair-chair plate. The armrest 106is attached with a height adjustable mechanism using height adjustmenthandle portion 302, per the needs and requirements of the user. Acylinder 112 is placed between a wheel flange 404 and a bearing assembly402 which helps in moving the seat in an upward and downward direction.

FIG. 7 illustrates a disassembled view of the components of the lowersection of the swivel-tilt mechanism chair 100. A lower portion ofchair-chair plate 208 is connected to a bearing assembly 402 which onthe lower side is connected to a ring-shaped section 2066. Thering-shaped section 2066 provides the swiveling movement of the chair100. Further, in case a base board is attached to the plate 208, thering-shaped section 2066 provides the swiveling movement the base board.Alternatively, the ring-shaped section 2066 provides the swivelingmovement to a tilt swivel TV cabinet, a TV display base, a video displaydevice, an advertisement boards or any mountable apparatus that isattached to the plate 208 for serving different purposes to the user.The swiveling movement stops only in a balanced position, providing abalance to the body of the attached assembly.

As shown in FIG. 7, the chair-chair plate 208 comprises of holes 702 anda piston 704. The holes 702 are used for attaching the seat 108 (notshown) to the plate 208 and the piston 704 is used for connecting thecylinder 112 to the plate 208. Bolt fasteners 706 are used to fasten thevarious components of the chair 100. The ring-shaped section 2066 isconnected to an extended arm 2062 and a holding section/knob 2060. Asdescribed earlier, the cylinder 112 having a bushing cap 708 rotatesinside a bush 114 which has a spring in the lateral section of thebearing assembly 402, which performs a pushing and/or pulling function,when the tilting of a backseat 102 (not shown) of the swivel chair 100either rearwardly or forwardly is done by the user which provides abalancing ball comfort to the user. Components such as Bushing plates710, screws 712 are used for integrating the components required forswivel and tilt mechanism of the present invention.

FIG. 8 illustrates a front view of a lower section of the swivel-tiltmechanism chair 100. All the components are assembled to provide aswiveling and/or tilting movement to the chair-chair plate 208 which isconnected to the concave shaped seat 102 (not shown) of the swivel-tiltmechanism chair 100. Components such as Bushing plates 710, screws 712are used for integrating the components required for swivel and tiltmechanism of the present invention.

FIG. 9 illustrates a sectional view (A-A) of the bearing base assembly402 of the swivel-tilt chair 100. A spring 902 is disposed in a lateralsection of the bearing assembly 402, which performs a pushing andpulling function, when the tilting of a backseat 102 (not shown) of thechair 100 either rearwardly or forwardly is done by the user andprovides a balancing ball comfort to the user. A bushing 114 provided atthe bottom of the pushing and pulling spring provide stability duringthe tilting of the chair 100. The bushing 114 is one classification ofthe overall category of bearings. The bushing 114 is a thin tube orsleeve that allows relative motion by sliding (our type), as compared torolling. The bushing might also be called a sleeve bearing. A side axisis installed vertically proximal to the spring assembly 902 and isconnected to the chair-chair mechanism connection or seat plate 208 ofthe chair 100 described later in the description. The side axis may be ahydraulic cylinder or a pneumatic cylinder 112 as in conventionalsliding and tilting chairs provided a lever base at the top portion ofthe side axis. The swiveling action of the seat 108 is performed alongthe side axis of the chair. The length of the side axis and the totallength of the bearing base assembly are but not limited to the examplementioned herein, not less than 150 cm and the diameter of the leverbase or the top of the cylinder is not less than 100 mm.

FIG. 10 shows a top view of the bearing base assembly 402 along thesection A-A. The top view displays an extended portion wherein a spring902 and a bush assembly are installed into the structure. A lever base2061 is shown and is connected to the base plate 208 (not shown) of thechair 100 through a connecting bearing mechanism.

FIG. 11 illustrates a compact view of the bearing base assemblymechanism displaying the bases for bearing and lever. The compact or theclosed view of the bearing base assembly displays a lever base 2061which is to be connected through connecting bearing to seat plate byusing a spring 902. A bearing main base, a lower bearing base and anupper bearing base are shown into which the bushings and the pushing andpulling spring 902 are installed.

FIG. 12 illustrates a perspective view of a control lever forcontrolling tilt of seat of the chair and its associated structure isshown. The control lever 206 has a holding knob 2060 at an end of an arm2062 which is connected to a ring-shaped section 2066. The handle or arm2062 is provided at the ring 2066 to control tilt of the seat 108 of thechair 100 as per the needs and requirements of the user. Further, thehandle 2062 has a pivotal connection 2068 to the ring-shaped section2066. The control lever 206 is movable and is adapted to operate tiltcontrol mechanism configured for adjusting and controlling the forwardand backward tilt of the chair 100. The handle 206 of the presentinvention is a manually actuated lever operatively connected to thering-shaped section 2066. The control lever 206 can tilt the chair 100between two extreme positions: an extreme forward position in which theseat is tilted forward by about 10° during tasks requiring a forwardleaning position; and an extreme backward position in which the seat istilted backwards by about 25° during tasks requiring a backward leaningposition. Between the extreme forward and rear positions, the chair isinfinitely adjustable by its occupant/user.

In a further embodiment of the present invention, a base board isattached to the plate 208, the control lever 206 provides the tiltingaction to the base board. Alternatively, the control lever 206 providesthe tilting movement to a tilt swivel TV cabinet, a TV display base, avideo display device, an advertisement boards or any mountable apparatusthat is attached to the plate 208 for serving different purposes to theuser.

FIG. 13 illustrates a sectional view of control lever for controllingtilt of seat of the chair of the present invention in accordance withthe disclosed architecture. As shown in the FIG. 13, on manuallyactivating the control lever 206 through an arm 2062, a tilt of seat 108of the chair 100 is adjusted and controlled as per the needs and desiresof the user. An air chamber in the cylinder 112 (not shown) is connectedto a piston that, when activated by pushing the lever 206, moves intothe chamber 2068. This action further compresses the air inside thechamber 2068, resulting in a tilting motion that allows the seat 108 ofthe chair 100.

FIG. 14 illustrates a side view of control lever for controlling tilt ofseat of the chair of the present invention in accordance with thedisclosed architecture. As shown in the FIG. 14, the arm 2062 is of anextended length having a connected holding section such as a knob 2060.During the operation of the control lever 206, the feet of the usershould be flat on the floor or a footrest and the legs should be bent atright angles to the floor.

As described above, the mechanism of the present invention allows threebasic motions: swiveling, height adjustment, and tilting. The mechanismis adapted to perform all of the above motions.

The swiveling action performed by the mechanism of the present inventiondoes not allow an apparatus such as a chair to move once it is stoppedin a balanced position. Additionally, the swiveling mechanism of theinvention may allow the user to balance in different tilting positions.

The bearing ring (such as a race bearing) is provided to facilitate theswiveling of the chair. In addition to swivel motion, the mechanism ofthe present invention preferably allows height adjustment along thelongitudinal axis performed by the cylinder and the coil spring. Fortilting, a tilt pressure is applied on the backrest, then, certain partsof the mechanism tilt while the seat remains stationary.

The height of the chair 100 is controlled from a regular feet-controlledpiston which can be easily and conveniently used for adjusting theheight as per the desire and needs of the user/occupant.

Additionally, bearing assembly of the present invention allows a seatsuch as seat 108 to be tilted in any direction relative to a chair baseand relative to a backrest 102. In addition, assembly provides hydraulicsystems which are capable of providing varying degrees of resistance tothis tilting movement, which is useful both in providing exercise forthe user as well as limiting the rate at which the tilting occurs for agiven amount of weight applied at any given point on seat 108. Thehydraulic systems further provide a hydraulic lock for securing the seatin any tilted position while also providing a simple mechanism forautomatically leveling the seat support and seat.

The swivel-tilt chair 100 of the present invention has Ergonomic backsupport and spinal alignment, strengthens the core of the user as theuser sits on the seat of the chair 100, is stable yet lightweight andmay be made up of molded PVC. The mechanism of the present invention mayhandle weights up to 400 lbs. The chair, further, has rolling, lockablecaster wheels. The chair 100 of the present invention can be suitablyused for general office chairs such as computer operation andrehabilitation chairs, as well as health equipment and cradles forlumbar muscle training. Further, the mechanism of the present inventioncan be used for as a balance board if we attach a board instead of thechair seat. The mechanism stops in the balanced position only and may bestopped in different tilting positions. The mechanism of the presentinvention may be used to build a tilt swivel base board, tilt swivel TVcabinet, TV display base, video display device or any mountableapparatus as well.

Notwithstanding the forgoing, the swivel-tilt chair 100 of the presentinvention and its various structural components can be any suitable sizeand configuration as is known in the art without affecting the overallconcept of the invention, provided that it accomplishes the above statedobjectives. One of ordinary skill in the art will appreciate that thesize of the swivel-tilt chair 100 and its various components, as show inthe FIGS. are for illustrative purposes only, and that many other sizesof the swivel-tilt chair 100 are well within the scope of the presentdisclosure. Although dimensions of the swivel-tilt chair 100 and itscomponents (i.e., length and width) are important design parameters forgood performance, the swivel-tilt chair 100 and its components may beany size and color that ensures optimal performance during use and/orthat suits user need and/or preference.

The foregoing description illustrates only certain preferred embodimentsof the invention. The invention is not limited to the foregoingexamples. That is, persons skilled in the art will appreciate andunderstand that modifications and variations are, or will be, possibleto utilize and carry out the teachings of the invention describedherein. Accordingly, all suitable modifications, variations andequivalents may be resorted to, and such modifications, variations andequivalents are intended to fall within the scope of the invention asdescribed and within the scope of the claims.

What has been described above includes examples of the claimed subjectmatter. It is, of course, not possible to describe every conceivablecombination of components or methodologies for purposes of describingthe claimed subject matter, but one of ordinary skill in the art mayrecognize that many further combinations and permutations of the claimedsubject matter are possible. Accordingly, the claimed subject matter isintended to embrace all such alterations, modifications and variationsthat fall within the spirit and scope of the appended claims.Furthermore, to the extent that the term “includes” is used in eitherthe detailed description or the claims, such term is intended to beinclusive in a manner similar to the term “comprising” as “comprising”is interpreted when employed as a transitional word in a claim.

What is claimed is:
 1. A swivel-tilt apparatus comprising: a bearingassembly; a spring assembly disposed in a lateral section of the bearingassembly; a side axis installed vertically proximal to the springassembly; and wherein, the swiveling action the apparatus is performedalong the side axis of the apparatus.
 2. The apparatus of claim 1, is aswivel-tilt chair or a swivel-tilt flat board.
 3. The apparatus of claim1, is a swivel-tilt advertisement board.
 4. The apparatus of claim 1, isa swivel-tilt TV cabinet, TV display base, or a video display device. 5.The apparatus of claim 1, further comprising bushings provided at thebottom of the spring.
 6. The apparatus of claim 1, wherein the side axisis a hydraulic cylinder or a pneumatic cylinder.
 7. The apparatus ofclaim 1, wherein the swiveling action is performed along the side axisof the chair.
 8. The apparatus of claim 1, wherein the bearing assemblyhas a cam and lever mechanism.
 9. The apparatus of claim 1, providesbalancing ball action.
 10. A chair comprising: a chair-chair platehaving an upper surface and a lower surface; a concave seat attached tothe upper surface; a bearing assembly attached to the lower surface; anda control lever attached to the plate to control tilt of the concaveseat.
 11. The chair of claim 10, wherein the control lever controls theforward tilt by 10°.
 12. The chair of claim 10, wherein the controllever controls the backward tilt by 25°.
 13. The chair of claim 10,wherein an upper portion of the cylinder is attached to a bush.
 14. Thechair of claim 10, wherein a lower portion of the cylinder is attachedto a wheel flange to which a number of rollers are attached throughlegs.
 15. The chair of claim 10, wherein the length of the bearing baseassembly is between 100 cm-150 cm.
 16. The chair of claim 10, whereinthe diameter of the bearing base assembly is between 70 mm-100 mm. 17.The chair of claim 10, further comprising a backrest connected through abackrest connecting flange.
 18. The backrest flange of claim 17,provides a smooth forward and rearward motion to the backrest during thetilting and swiveling action of the chair.
 19. The backrest of claim 17,is convex shaped to give comfort to the back and shoulders of a usersitting on the chair.
 20. A bearing assembly for a balance ball feelingcomprising: a spring to tilt an apparatus having the bearing assembly; acam and lever mechanism for providing a smooth swiveling action; and thecam and lever mechanism provide a balancing ball action through atilting action.
 21. The bearing assembly of claim 20, further comprisingan upper bearing base and a lower bearing base.
 22. The bearing assemblyof claim 20, wherein the length of the bearing base assembly is between90 cm-150 cm.
 23. The bearing assembly of claim 20, is attached to alower surface of a base plate through the upper base.
 24. The bearingassembly of claim 21, is attached to a pneumatic or a hydraulic cylinderthrough the lower bearing base.
 25. The bearing assembly of claim 22,further stops the apparatus in a balanced position.
 26. The bearingassembly of claim 20, further stops the apparatus in different tiltingpositions.